Dust-collector.



H.' LECHTENBBRG.

DUST COLLECTOR.

APPMOATION FILED Amma, 1914.

H. LECHTENBERG.

DUST COLLECTOR. APPLICATION FILED Almze, 1914.

Patented Sept. 1914.

2 SHEETS-SHEET-2.

@Uefa ZLW/ A l y To all 11j/omit may concern sa 111er.

HENRY LECHTENBERQOF QUINCY, ILLINOIS, ASSIGNOR T. LECHTENBERG.

"DUs'T-ooLLEo'ToR.

Be it known that L HENRY LECHTEN- BERG, a citizen of the United States' of America, and a resident of Quincy, in the county of Adams andttate of Illinois, have invented certain new and useful Improve ments in Dust-Collectors, ofwhich the fol'- lowing is. a full, clear, and exact description,`

reference being had lto the accompanying` drawings, forminga part of this specifica` tion. 1 f

My invention relates to a ldust collector, the principal object being to produce a' dust collector which is so constructed that the dust adhering to its'I filtering devices may be easily and quickly removed.

The preferred form 'of my invention preferably comprises filtering devices arranged in a dust receiving housing7 an outlet device through which air is discharged from f said housing, and anexhaust fan or blower -for drawing air through said parts. lThe outlet device is provided with .a plurality of suction chambers'communicating with the.

filtering devices. When thedust collector is in operation dustladen airis admitted to the dust receiving housing and the ydust collects on the surface of the filtering devices while the air passing through the filtering devices is discharged into the suction chamber. Each. suction chamber is preferably provided with an. inlet port through which air may iiow from the exterior of the housing to the filtering device associated with said suction chamber, and a valve lin the suction chamber may be, operated to open and This valve normally closes the inlet port but it may be moved to close the suction chamberat a point between the iltering device and- 4the exhaust. fan. The exhaust tan normally draws air through both of .the filtering devices and through the suction chambers associated therewith. In cleaning'the iltering material thedirection of movement of the air is reversed so that the air passing through the filtering material tends to loosen and remove the dust therefrom. Either'of the iltering devices may be cleaned while the fan is in operation by .opening the inlet port in the suction chamber associated with said filtering devicevand closing the suction chamber at a point between said inlet port and the fan. The air will then rush through the open inletport in the suction chamber andinstead otpas'singdirectly tothe fanl this air will iow 1n- Specication. of Letters Patent.A Patented Septal, 1914i.

Appueation meldaprn 2e. 1914. serial No. 835,119.

tion, of a dust collector embodying the eatures .of my -inventionfv Fig. H is a front elevation of the dust collector shown in Fig.

. I. ,Fig-Hlm an enlarged horizontal section' taken throi'igh the upper `portion of the dust rcollector showing the outlet device through which ,air is discharged from the filtering elements.' Fig. IV is a vertical `sec- 1 tion of the jarring device. Fig. V is a horizontal section of the jarring device. y

` 1 designates a dustreceiving housing Iprovided with an inlet opening 2, and `3- is` a delivery pipe for conducting dust laden air 'to theinlet opei'iing. An outlet device X lis provided with surtion chambers 1 and 5 through which air. is discharged from ythe housing. A suction" pipe 6 communicating with the suction chamber, leads to an eX- haust fan 7. 9 designates a hopper arranged .below the housing 1 and provided .with a discharge member 10 at its lower end.

The filtering elements preferably comprise .rectangulaiaouter frames 12 Ahaving top members 13 winch rest on angle bars 13 at the upper end of the housing. The filtering materialpreterably consists of :tabriowebs 14 securcdto the rectangular outer frames.

Passageways 15 and 16 located in the iilterl ing devices are formed in part by th'e'rectanguiar outer frames 12 andin part by inner tramebars 17. rIhe outer 'trames 12 are #separated from each other to admit the dust laden air to the filtering mate-rial and the frame bars 17 are separated from eachother, as seen in U1, to permit the filtered air .to yflow. from the filtering' material to the passageways and 1G.'` The filtering element-sin the'housing 1 constitute 2 filtering devices designated A' and B in Fig. HI.

'The passageway 15 formed in one-of the upper corners of the iltering device A while I the passageway 16 is located at a vsimilar point in the filtering device B. 18`designates a? division plate separating the passageway 15 from thepassageway 16.`

The operation oi my dust collector is as follows: The exhaust fan 7 is operated to draw the dust laden air troni the delivery pipe 3 totheiltering devices A and B and the dust collects `on the filtering material 14 while the filtered air passing through saidmaterial is conducted through the pas-l sageways l5 and 16 and discharged into the suction chambers 4 and 5 from which it is conducted tothefan'? by the suction pipe 6. In passing through "the filtering devices the air is divided intotwo opposltely moving currents one of which fiows out through the passageway 15 and suction chamber 4, while the other passes through thepassageway 16 and suction chamber 5. Each of the suction chambers 4 and 5 is provided with an inlet port 19 anda valve or closure 20 which normally closes said inlet port as shown in full lines Fig. III. The closures 20 are Ahinged at 21 and either of these closures vmay be shifted to the position shown in dotted lines Fig. III.

The filtering device A may be cleaned while the exhaust fa'n'is in operation by closing a `valve 22 (Fig. I) inthe deliver pipe ,3 to prevent vtheadmission of dust la en air into the housing 1, and shifting the valve20 in the'suction chamber 4 to the position shown in dotted lines Fig. III. The parts are then so positioned'that lthe air supply cannot enter the housing at the main inlet opening 2,.and in response to the action of the exhaust fan,air is drawn into the .apparatus at the inlet opening 19 of suction .chamber 4 as indicated by the dotted arrow Fig.. III.I The closure 20 in suction chamber4 is positioned to prevent the incoming air from fiowing directly to the fan, and the i closure 2O in suction chamber 5 ispositioned to permit the flow of air from the filtering device B to the fan. The air enters at the inlet port 19 of the suction chamber 4,` flows into the passageway 15 and through the filtering material of the *filtering device A in 'a direction opposite to the' direction of flow during the filtering operation, thus loosening and removing the dust from the filtering device A. The Iair current. then -fiows through the filtering device B into the'v passageway 16 and is drawn through the'suction chamber 5 and suction pipe 6 .leading to the exhaust fan. The suction fan may be operated with the parts vposi- -.tioned as just described for any desired length of time to thoroughly clean the filtering material of the'filtering device A.,

. and the closure 20 in the suction chamber 4 is then shifted to the osition shown in full lines Fig. III, there y closing the inlet port19 and at the same time opening the outer end of the suction chamber 4. The

`valve 22 is then opened. This places the closure in itsv normal position and in response to the operation of the fan the air currents will flow through the filtering devicesas indicated by the arrows shown in fulll lines Fig. III. It willbe readily understood that the filtering device B may be cleaned by shifting the closure 20 in suction chamher to the positionlshown in dot* ted lines, thereby opening the-inlet port 19 n'v'suction chamber 5 and closin the outer end of said suction chamber. he direction of flow of the air in suction .Chamber 5 will then be reversed and the air will fiow from said suction chamber through the filtering material ofthe filtering device A, and finally pass from the housing through the suction chamber'4.` The means for operatframes of the filtering device A and 32 designates similar bars connecting thel frames f of the filtering device B. Each filtering desy vice is a yieldable structure which maybe -jarred by striking its shaker bars.

33 designates hammer housings secured to the side walls of the main housingl jacent to the outer ends of the shakerbars l31 and 32. Drive shafts 34 rotatably mounted in the hammer housings are provided with sprocket wheels 35 adapted to be driven by .chains 36 passingv around drive wheels 37, the latter beingy secured to a drive shaft 38. at its inner end to receive one of the sha rer barsand'closed at its outer end to prevent the escape of dust from the main housing 1.

Each 'of the jarring devices I have shown Each hammer housing 33 is o en..

comprises a -hammer 40 slidably mountedV in the hammer housing and springs 41 tending to throwthehammer into engagement: with a shaker bar.

hammer housing 33 and secured `tothe rotatable shaft 34. Each cam fingerl 42 is adapted to engage a lug `43 on the hammer 40-with the result of moving the hammer away from the adjacentl shaker bar, and

when the cam finger is released from the vlug the springs 41 throw the hammer into en gagement withthe shaker bar7 thereby jarring`the ltering device to which `said shaker barl is secured.

I claim j y i 1. A dust collector provided with filtering devices each having an outlet opening through whichair is discharged during the filteringl operations and also during cleaning operat1ons,and a suction fan, each'of said filtering devices being provided with'a suction cham-l ber for conducting air toward said `suction fan lduring the filtering operations as well as isa 110 42' designates cam fingers located 1n the during cleaning operations, a suction pipe common to both of said suction chambers leading from said suction chambers to said suction fan, combined with valves, arranged in said suction chambers, adapted to close communication Vbetween the suction chambers and said suction pipe, each of said suction chambers being provided with a inormally closed inlet port, located adjacent to one of said valves, for the admission of air at a point between one of the filtering devices and said suction pipe.

Q. A dust collector provided with filtering de vices each having an outlet opening through which air is discharged during' the filtering operations and also during cleaning operations, and a suction fan, each of said filtering devices being provided with a suction chamber for conducting air toward said suc tion fan during` the filtering operations as well as during cleaning operations, a suction pipe common to both of said suction chambers leading'from said suction chambers to said suction fan, combined with valves, ar-V ranged in said suction chambers, adapted to close communication between the suction chambers and said suction pipe, each ofsaid suction chambers being provided with a normally closed inlet port, locatedadjacent'to.

one of said valves, for the admission of air at a point between one of the filtering dewices and said suction pipe, said valves being adapted to open and close said inlet ports.

3. A dust collector provided with flterin devices each having an outlet opening and a suction chamber communicating with said outlet opening, the dust receiving sides of said filtering devices being in open communication with each other, a suction fan for drawing air through each of said suction chambers during the filtering operation,

each of the suction chambers being provided with an inlet port for the admission of air from the exterior of the filtering device and a closure normally closing said inlet ports,I

said closure being movable to close said out let device at a point beyond said inlet port thereby opening said inlet port so as'to permit the iiow of air through'said inlet port and through the filtering devices successively to the said suction fan.

s. A dust collector comprising a housing having an inlet opening for the admission of a d ust laden air current and a plurality of outlet passageways, a valve adapted to prevent the admission of air at said inlet opening, filtering devices between said inlet opening and the outlet passageways, the dust receivingv sides of said filtering devices being in open communication with each other, suction chambers communicating with said outlet pasageways adapted to receive air flowing from said ltering devices, an exhaust Afan for drawing air through saidl lsuction chambers and the filtering devices associated therewith, each of said suction chambers being provided with an inletport for the admission of air from the exterior of' said housing, closures normally closing said inlet ports, each of-said closures being movable tov close a suction chamber at a point between its inlet port and said exhaust fan so'as to deflect the air from an open inlet port into one yof said ltering devices and through another of the filtering devices 75 air through said suction chambers at the same time to move dust to all of said filterin devices, each of said -suction chambers' being provided with an inlet port for the admission of air yfrom the exterior of said housing, means for closing either of' said suction chambers to prevent air from flowing outwardlythrough the outlet passageways of. either of the filtering devices thereby deflecting the air from one of said inlet ports, through the filtering devices successively and to said suction fan, said means including valves which normally close said inlet po-rts, the said Vvalves being adapted to lie across the suction chambers at points between the inlet ports and said suction fan.

HENRY LECHTENBERG. In the presence of- H. C. SPRIoK, C. A.. LECHTENBERG; 

